"Things are going to happen," coach Erik Spoelstra said, downplaying the significance of the injury. "You could see he didn't have quite the same mobility in the second half the other night. He was sore [Sunday] and the same today. We'll get him as much treatment as we can and reevaluate him tomorrow when we get back to Miami."

Whiteside missed extended time at the start of last season due to a bone bruise on his left knee.

"It's hard to say," Whiteside said when asked to compare the two injuries. "But I don't think it's super serious right now.

"It feels better than it did yesterday. I'm not worried about it."

The Heat next open a four-game homestand Wednesday night against the San Antonio Spurs at AmericanAirlines Arena.

Whiteside said he is optimistic about a return then.

Guard Goran Dragic, who missed Saturday's loss to the Hawks with a sore right foot, participated in Monday morning's shootaround and returned Monday night.

"It's great to have more back," Spoelstra said.

Dragic said he was curious how he would come out of the game.

"I feel like I've had enough time that this thing at least healed. We'll see," he said.

Dragic took a cortisone shot last week, but said there have not been any follow-up injections.